/mandos/release : revision 237.7.127

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

28

# along with this program. If not, see

29

# <http://www.gnu.org/licenses/>.

30

#

31

# Contact the authors at <mandos@fukt.bsnet.se>.

31

# Contact the authors at <mandos@recompile.se>.

32

#

33

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

63

65

import cPickle as pickle

64

66

import multiprocessing

65

67

import types

68

import binascii

69

import tempfile

70

import itertools

66

71

67

72

import dbus

68

73

import dbus.service

73

78

import ctypes.util

74

79

import xml.dom.minidom

75

80

import inspect

81

import GnuPGInterface

76

82

77

83

try:

78

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

82

88

except ImportError:

83

89

SO_BINDTODEVICE = None

84

90

85

86

version = "1.3.1"

87

88

#logger = logging.getLogger('mandos')

89

logger = logging.Logger('mandos')

91

version = "1.5.3"

92

stored_state_file = "clients.pickle"

93

94

logger = logging.getLogger()

90

95

syslogger = (logging.handlers.SysLogHandler

91

96

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

92

97

address = str("/dev/log")))

93

syslogger.setFormatter(logging.Formatter

94

('Mandos [%(process)d]: %(levelname)s:'

95

' %(message)s'))

96

logger.addHandler(syslogger)

97

98

console = logging.StreamHandler()

99

console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

100

' %(levelname)s:'

101

' %(message)s'))

102

logger.addHandler(console)

98

99

try:

100

if_nametoindex = (ctypes.cdll.LoadLibrary

101

(ctypes.util.find_library("c"))

102

.if_nametoindex)

103

except (OSError, AttributeError):

104

def if_nametoindex(interface):

105

"Get an interface index the hard way, i.e. using fcntl()"

106

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

107

with contextlib.closing(socket.socket()) as s:

108

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

109

struct.pack(str("16s16x"),

110

interface))

111

interface_index = struct.unpack(str("I"),

112

ifreq[16:20])[0]

113

return interface_index

114

115

116

def initlogger(debug, level=logging.WARNING):

117

"""init logger and add loglevel"""

118

119

syslogger.setFormatter(logging.Formatter

120

('Mandos [%(process)d]: %(levelname)s:'

121

' %(message)s'))

122

logger.addHandler(syslogger)

123

124

if debug:

125

console = logging.StreamHandler()

126

console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

127

' [%(process)d]:'

128

' %(levelname)s:'

129

' %(message)s'))

130

logger.addHandler(console)

131

logger.setLevel(level)

132

133

134

class PGPError(Exception):

135

"""Exception if encryption/decryption fails"""

136

pass

137

138

139

class PGPEngine(object):

140

"""A simple class for OpenPGP symmetric encryption & decryption"""

141

def __init__(self):

142

self.gnupg = GnuPGInterface.GnuPG()

143

self.tempdir = tempfile.mkdtemp(prefix="mandos-")

144

self.gnupg = GnuPGInterface.GnuPG()

145

self.gnupg.options.meta_interactive = False

146

self.gnupg.options.homedir = self.tempdir

147

self.gnupg.options.extra_args.extend(['--force-mdc',

148

'--quiet',

149

'--no-use-agent'])

150

151

def __enter__(self):

152

return self

153

154

def __exit__ (self, exc_type, exc_value, traceback):

155

self._cleanup()

156

return False

157

158

def __del__(self):

159

self._cleanup()

160

161

def _cleanup(self):

162

if self.tempdir is not None:

163

# Delete contents of tempdir

164

for root, dirs, files in os.walk(self.tempdir,

165

topdown = False):

166

for filename in files:

167

os.remove(os.path.join(root, filename))

168

for dirname in dirs:

169

os.rmdir(os.path.join(root, dirname))

170

# Remove tempdir

171

os.rmdir(self.tempdir)

172

self.tempdir = None

173

174

def password_encode(self, password):

175

# Passphrase can not be empty and can not contain newlines or

176

# NUL bytes. So we prefix it and hex encode it.

177

return b"mandos" + binascii.hexlify(password)

178

179

def encrypt(self, data, password):

180

self.gnupg.passphrase = self.password_encode(password)

181

with open(os.devnull, "w") as devnull:

182

try:

183

proc = self.gnupg.run(['--symmetric'],

184

create_fhs=['stdin', 'stdout'],

185

attach_fhs={'stderr': devnull})

186

with contextlib.closing(proc.handles['stdin']) as f:

187

f.write(data)

188

with contextlib.closing(proc.handles['stdout']) as f:

189

ciphertext = f.read()

190

proc.wait()

191

except IOError as e:

192

raise PGPError(e)

193

self.gnupg.passphrase = None

194

return ciphertext

195

196

def decrypt(self, data, password):

197

self.gnupg.passphrase = self.password_encode(password)

198

with open(os.devnull, "w") as devnull:

199

try:

200

proc = self.gnupg.run(['--decrypt'],

201

create_fhs=['stdin', 'stdout'],

202

attach_fhs={'stderr': devnull})

203

with contextlib.closing(proc.handles['stdin']) as f:

204

f.write(data)

205

with contextlib.closing(proc.handles['stdout']) as f:

206

decrypted_plaintext = f.read()

207

proc.wait()

208

except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

211

return decrypted_plaintext

212

103

213

104

214

class AvahiError(Exception):

105

215

def __init__(self, value, *args, **kwargs):

135

245

server: D-Bus Server

136

246

bus: dbus.SystemBus()

137

247

"""

248

138

249

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

139

250

servicetype = None, port = None, TXT = None,

140

251

domain = "", host = "", max_renames = 32768,

153

264

self.server = None

154

265

self.bus = bus

155

266

self.entry_group_state_changed_match = None

267

156

268

def rename(self):

157

269

"""Derived from the Avahi example code"""

158

270

if self.rename_count >= self.max_renames:

160

272

" after %i retries, exiting.",

161

273

self.rename_count)

162

274

raise AvahiServiceError("Too many renames")

163

self.name = unicode(self.server.GetAlternativeServiceName(self.name))

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

164

277

logger.info("Changing Zeroconf service name to %r ...",

165

278

self.name)

166

syslogger.setFormatter(logging.Formatter

167

('Mandos (%s) [%%(process)d]:'

168

' %%(levelname)s: %%(message)s'

169

% self.name))

170

279

self.remove()

171

280

try:

172

281

self.add()

173

282

except dbus.exceptions.DBusException as error:

174

logger.critical("DBusException: %s", error)

283

logger.critical("D-Bus Exception", exc_info=error)

175

284

self.cleanup()

176

285

os._exit(1)

177

286

self.rename_count += 1

287

178

288

def remove(self):

179

289

"""Derived from the Avahi example code"""

180

290

if self.entry_group_state_changed_match is not None:

182

292

self.entry_group_state_changed_match = None

183

293

if self.group is not None:

184

294

self.group.Reset()

295

185

296

def add(self):

186

297

"""Derived from the Avahi example code"""

187

298

self.remove()

192

303

avahi.DBUS_INTERFACE_ENTRY_GROUP)

193

304

self.entry_group_state_changed_match = (

194

305

self.group.connect_to_signal(

195

'StateChanged', self .entry_group_state_changed))

306

'StateChanged', self.entry_group_state_changed))

196

307

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

197

308

self.name, self.type)

198

309

self.group.AddService(

204

315

dbus.UInt16(self.port),

205

316

avahi.string_array_to_txt_array(self.TXT))

206

317

self.group.Commit()

318

207

319

def entry_group_state_changed(self, state, error):

208

320

"""Derived from the Avahi example code"""

209

321

logger.debug("Avahi entry group state change: %i", state)

216

328

elif state == avahi.ENTRY_GROUP_FAILURE:

217

329

logger.critical("Avahi: Error in group state changed %s",

218

330

unicode(error))

219

raise AvahiGroupError("State changed: %s"

220

% unicode(error))

331

raise AvahiGroupError("State changed: {0!s}"

332

.format(error))

333

221

334

def cleanup(self):

222

335

"""Derived from the Avahi example code"""

223

336

if self.group is not None:

224

337

try:

225

338

self.group.Free()

226

339

except (dbus.exceptions.UnknownMethodException,

227

dbus.exceptions.DBusException) as e:

340

dbus.exceptions.DBusException):

228

341

pass

229

342

self.group = None

230

343

self.remove()

344

231

345

def server_state_changed(self, state, error=None):

232

346

"""Derived from the Avahi example code"""

233

347

logger.debug("Avahi server state change: %i", state)

252

366

logger.debug("Unknown state: %r", state)

253

367

else:

254

368

logger.debug("Unknown state: %r: %r", state, error)

369

255

370

def activate(self):

256

371

"""Derived from the Avahi example code"""

257

372

if self.server is None:

264

379

self.server_state_changed)

265

380

self.server_state_changed(self.server.GetState())

266

381

382

class AvahiServiceToSyslog(AvahiService):

383

def rename(self):

384

"""Add the new name to the syslog messages"""

385

ret = AvahiService.rename(self)

386

syslogger.setFormatter(logging.Formatter

387

('Mandos ({0}) [%(process)d]:'

388

' %(levelname)s: %(message)s'

389

.format(self.name)))

390

return ret

267

391

268

def _timedelta_to_milliseconds(td):

392

def timedelta_to_milliseconds(td):

269

393

"Convert a datetime.timedelta() to milliseconds"

270

394

return ((td.days * 24 * 60 * 60 * 1000)

271

395

+ (td.seconds * 1000)

272

396

+ (td.microseconds // 1000))

273

397

274

398

class Client(object):

275

399

"""A representation of a client host served by this server.

276

400

277

401

Attributes:

278

_approved: bool(); 'None' if not yet approved/disapproved

402

approved: bool(); 'None' if not yet approved/disapproved

279

403

approval_delay: datetime.timedelta(); Time to wait for approval

280

404

approval_duration: datetime.timedelta(); Duration of one approval

281

405

checker: subprocess.Popen(); a running checker process used

288

412

instance %(name)s can be used in the command.

289

413

checker_initiator_tag: a gobject event source tag, or None

290

414

created: datetime.datetime(); (UTC) object creation

415

client_structure: Object describing what attributes a client has

416

and is used for storing the client at exit

291

417

current_checker_command: string; current running checker_command

292

disable_hook: If set, called by disable() as disable_hook(self)

293

418

disable_initiator_tag: a gobject event source tag, or None

294

419

enabled: bool()

295

420

fingerprint: string (40 or 32 hexadecimal digits); used to

298

423

interval: datetime.timedelta(); How often to start a new checker

299

424

last_approval_request: datetime.datetime(); (UTC) or None

300

425

last_checked_ok: datetime.datetime(); (UTC) or None

301

last_enabled: datetime.datetime(); (UTC)

426

last_checker_status: integer between 0 and 255 reflecting exit

427

status of last checker. -1 reflects crashed

428

checker, -2 means no checker completed yet.

429

last_enabled: datetime.datetime(); (UTC) or None

302

430

name: string; from the config file, used in log messages and

303

431

D-Bus identifiers

304

432

secret: bytestring; sent verbatim (over TLS) to client

305

433

timeout: datetime.timedelta(); How long from last_checked_ok

306

434

until this client is disabled

307

extended_timeout: extra long timeout when password has been sent

435

extended_timeout: extra long timeout when secret has been sent

308

436

runtime_expansions: Allowed attributes for runtime expansion.

309

437

expires: datetime.datetime(); time (UTC) when a client will be

310

438

disabled, or None

314

442

"created", "enabled", "fingerprint",

315

443

"host", "interval", "last_checked_ok",

316

444

"last_enabled", "name", "timeout")

445

client_defaults = { "timeout": "5m",

446

"extended_timeout": "15m",

447

"interval": "2m",

448

"checker": "fping -q -- %%(host)s",

449

"host": "",

450

"approval_delay": "0s",

451

"approval_duration": "1s",

452

"approved_by_default": "True",

453

"enabled": "True",

454

}

317

455

318

456

def timeout_milliseconds(self):

319

457

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

458

return timedelta_to_milliseconds(self.timeout)

321

459

322

460

def extended_timeout_milliseconds(self):

323

461

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

462

return timedelta_to_milliseconds(self.extended_timeout)

325

463

326

464

def interval_milliseconds(self):

327

465

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

466

return timedelta_to_milliseconds(self.interval)

329

467

330

468

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

def __init__(self, name = None, disable_hook=None, config=None):

334

"""Note: the 'checker' key in 'config' sets the

335

'checker_command' attribute and *not* the 'checker'

336

attribute."""

469

return timedelta_to_milliseconds(self.approval_delay)

470

471

@staticmethod

472

def config_parser(config):

473

"""Construct a new dict of client settings of this form:

474

{ client_name: {setting_name: value, ...}, ...}

475

with exceptions for any special settings as defined above.

476

NOTE: Must be a pure function. Must return the same result

477

value given the same arguments.

478

"""

479

settings = {}

480

for client_name in config.sections():

481

section = dict(config.items(client_name))

482

client = settings[client_name] = {}

483

484

client["host"] = section["host"]

485

# Reformat values from string types to Python types

486

client["approved_by_default"] = config.getboolean(

487

client_name, "approved_by_default")

488

client["enabled"] = config.getboolean(client_name,

489

"enabled")

490

491

client["fingerprint"] = (section["fingerprint"].upper()

492

.replace(" ", ""))

493

if "secret" in section:

494

client["secret"] = section["secret"].decode("base64")

495

elif "secfile" in section:

496

with open(os.path.expanduser(os.path.expandvars

497

(section["secfile"])),

498

"rb") as secfile:

499

client["secret"] = secfile.read()

500

else:

501

raise TypeError("No secret or secfile for section {0}"

502

.format(section))

503

client["timeout"] = string_to_delta(section["timeout"])

504

client["extended_timeout"] = string_to_delta(

505

section["extended_timeout"])

506

client["interval"] = string_to_delta(section["interval"])

507

client["approval_delay"] = string_to_delta(

508

section["approval_delay"])

509

client["approval_duration"] = string_to_delta(

510

section["approval_duration"])

511

client["checker_command"] = section["checker"]

512

client["last_approval_request"] = None

513

client["last_checked_ok"] = None

514

client["last_checker_status"] = -2

515

516

return settings

517

518

def __init__(self, settings, name = None):

337

519

self.name = name

338

if config is None:

339

config = {}

520

# adding all client settings

521

for setting, value in settings.iteritems():

522

setattr(self, setting, value)

523

524

if self.enabled:

525

if not hasattr(self, "last_enabled"):

526

self.last_enabled = datetime.datetime.utcnow()

527

if not hasattr(self, "expires"):

528

self.expires = (datetime.datetime.utcnow()

529

+ self.timeout)

530

else:

531

self.last_enabled = None

532

self.expires = None

533

340

534

logger.debug("Creating client %r", self.name)

341

535

# Uppercase and remove spaces from fingerprint for later

342

536

# comparison purposes with return value from the fingerprint()

343

537

# function

344

self.fingerprint = (config["fingerprint"].upper()

345

.replace(" ", ""))

346

538

logger.debug(" Fingerprint: %s", self.fingerprint)

347

if "secret" in config:

348

self.secret = config["secret"].decode("base64")

349

elif "secfile" in config:

350

with open(os.path.expanduser(os.path.expandvars

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

raise TypeError("No secret or secfile for client %s"

356

% self.name)

357

self.host = config.get("host", "")

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

self.timeout = string_to_delta(config["timeout"])

364

self.extended_timeout = string_to_delta(config["extended_timeout"])

365

self.interval = string_to_delta(config["interval"])

366

self.disable_hook = disable_hook

539

self.created = settings.get("created",

540

datetime.datetime.utcnow())

541

542

# attributes specific for this server instance

367

543

self.checker = None

368

544

self.checker_initiator_tag = None

369

545

self.disable_initiator_tag = None

370

self.expires = None

371

546

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

547

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

self.approved_by_default = config.get("approved_by_default",

377

True)

548

self.approved = None

378

549

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

550

self.changedstate = (multiprocessing_manager

551

.Condition(multiprocessing_manager

552

.Lock()))

553

self.client_structure = [attr for attr in

554

self.__dict__.iterkeys()

555

if not attr.startswith("_")]

556

self.client_structure.append("client_structure")

557

558

for name, t in inspect.getmembers(type(self),

559

lambda obj:

560

isinstance(obj,

561

property)):

562

if not name.startswith("_"):

563

self.client_structure.append(name)

384

564

565

# Send notice to process children that client state has changed

385

566

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

567

with self.changedstate:

568

self.changedstate.notify_all()

569

390

570

def enable(self):

391

571

"""Start this client's checker and timeout hooks"""

392

572

if getattr(self, "enabled", False):

393

573

# Already enabled

394

574

return

395

575

self.send_changedstate()

396

# Schedule a new checker to be started an 'interval' from now,

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

# Schedule a disable() when 'timeout' has passed

402

576

self.expires = datetime.datetime.utcnow() + self.timeout

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

577

self.enabled = True

407

578

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

579

self.init_checker()

410

580

411

581

def disable(self, quiet=True):

412

582

"""Disable this client."""

424

594

gobject.source_remove(self.checker_initiator_tag)

425

595

self.checker_initiator_tag = None

426

596

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

597

self.enabled = False

430

598

# Do not run this again if called by a gobject.timeout_add

431

599

return False

432

600

433

601

def __del__(self):

434

self.disable_hook = None

435

602

self.disable()

436

603

604

def init_checker(self):

605

# Schedule a new checker to be started an 'interval' from now,

606

# and every interval from then on.

607

self.checker_initiator_tag = (gobject.timeout_add

608

(self.interval_milliseconds(),

609

self.start_checker))

610

# Schedule a disable() when 'timeout' has passed

611

self.disable_initiator_tag = (gobject.timeout_add

612

(self.timeout_milliseconds(),

613

self.disable))

614

# Also start a new checker *right now*.

615

self.start_checker()

616

437

617

def checker_callback(self, pid, condition, command):

438

618

"""The checker has completed, so take appropriate actions."""

439

619

self.checker_callback_tag = None

440

620

self.checker = None

441

621

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

622

self.last_checker_status = os.WEXITSTATUS(condition)

623

if self.last_checker_status == 0:

444

624

logger.info("Checker for %(name)s succeeded",

445

625

vars(self))

446

626

self.checked_ok()

448

628

logger.info("Checker for %(name)s failed",

449

629

vars(self))

450

630

else:

631

self.last_checker_status = -1

451

632

logger.warning("Checker for %(name)s crashed?",

452

633

vars(self))

453

634

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

This should only be called when the client has been seen,

458

alive and well.

459

"""

635

def checked_ok(self):

636

"""Assert that the client has been seen, alive and well."""

637

self.last_checked_ok = datetime.datetime.utcnow()

638

self.last_checker_status = 0

639

self.bump_timeout()

640

641

def bump_timeout(self, timeout=None):

642

"""Bump up the timeout for this client."""

460

643

if timeout is None:

461

644

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

self.expires = datetime.datetime.utcnow() + timeout

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

645

if self.disable_initiator_tag is not None:

646

gobject.source_remove(self.disable_initiator_tag)

647

if getattr(self, "enabled", False):

648

self.disable_initiator_tag = (gobject.timeout_add

649

(timedelta_to_milliseconds

650

(timeout), self.disable))

651

self.expires = datetime.datetime.utcnow() + timeout

468

652

469

653

def need_approval(self):

470

654

self.last_approval_request = datetime.datetime.utcnow()

475

659

If a checker already exists, leave it running and do

476

660

nothing."""

477

661

# The reason for not killing a running checker is that if we

478

# did that, then if a checker (for some reason) started

479

# running slowly and taking more than 'interval' time, the

480

# client would inevitably timeout, since no checker would get

481

# a chance to run to completion. If we instead leave running

662

# did that, and if a checker (for some reason) started running

663

# slowly and taking more than 'interval' time, then the client

664

# would inevitably timeout, since no checker would get a

665

# chance to run to completion. If we instead leave running

482

666

# checkers alone, the checker would have to take more time

483

667

# than 'timeout' for the client to be disabled, which is as it

484

668

# should be.

514

698

try:

515

699

command = self.checker_command % escaped_attrs

516

700

except TypeError as error:

517

logger.error('Could not format string "%s":'

518

' %s', self.checker_command, error)

701

logger.error('Could not format string "%s"',

702

self.checker_command, exc_info=error)

519

703

return True # Try again later

520

704

self.current_checker_command = command

521

705

try:

539

723

gobject.source_remove(self.checker_callback_tag)

540

724

self.checker_callback(pid, status, command)

541

725

except OSError as error:

542

logger.error("Failed to start subprocess: %s",

543

error)

726

logger.error("Failed to start subprocess",

727

exc_info=error)

544

728

# Re-run this periodically if run by gobject.timeout_add

545

729

return True

546

730

553

737

return

554

738

logger.debug("Stopping checker for %(name)s", vars(self))

555

739

try:

556

os.kill(self.checker.pid, signal.SIGTERM)

740

self.checker.terminate()

557

741

#time.sleep(0.5)

558

742

#if self.checker.poll() is None:

559

# os.kill(self.checker.pid, signal.SIGKILL)

743

# self.checker.kill()

560

744

except OSError as error:

561

745

if error.errno != errno.ESRCH: # No such process

562

746

raise

579

763

# "Set" method, so we fail early here:

580

764

if byte_arrays and signature != "ay":

581

765

raise ValueError("Byte arrays not supported for non-'ay'"

582

" signature %r" % signature)

766

" signature {0!r}".format(signature))

583

767

def decorator(func):

584

768

func._dbus_is_property = True

585

769

func._dbus_interface = dbus_interface

593

777

return decorator

594

778

595

779

780

def dbus_interface_annotations(dbus_interface):

781

"""Decorator for marking functions returning interface annotations

782

783

Usage:

784

785

@dbus_interface_annotations("org.example.Interface")

786

def _foo(self): # Function name does not matter

787

return {"org.freedesktop.DBus.Deprecated": "true",

788

"org.freedesktop.DBus.Property.EmitsChangedSignal":

789

"false"}

790

"""

791

def decorator(func):

792

func._dbus_is_interface = True

793

func._dbus_interface = dbus_interface

794

func._dbus_name = dbus_interface

795

return func

796

return decorator

797

798

799

def dbus_annotations(annotations):

800

"""Decorator to annotate D-Bus methods, signals or properties

801

Usage:

802

803

@dbus_service_property("org.example.Interface", signature="b",

804

access="r")

805

@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",

806

"org.freedesktop.DBus.Property."

807

"EmitsChangedSignal": "false"})

808

def Property_dbus_property(self):

809

return dbus.Boolean(False)

810

"""

811

def decorator(func):

812

func._dbus_annotations = annotations

813

return func

814

return decorator

815

816

596

817

class DBusPropertyException(dbus.exceptions.DBusException):

597

818

"""A base class for D-Bus property-related exceptions

598

819

"""

621

842

"""

622

843

623

844

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

845

def _is_dbus_thing(thing):

846

"""Returns a function testing if an attribute is a D-Bus thing

847

848

If called like _is_dbus_thing("method") it returns a function

849

suitable for use as predicate to inspect.getmembers().

850

"""

851

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

852

False)

626

853

627

def _get_all_dbus_properties(self):

854

def _get_all_dbus_things(self, thing):

628

855

"""Returns a generator of (name, attribute) pairs

629

856

"""

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

857

return ((getattr(athing.__get__(self), "_dbus_name",

858

name),

859

athing.__get__(self))

631

860

for cls in self.__class__.__mro__

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

861

for name, athing in

862

inspect.getmembers(cls,

863

self._is_dbus_thing(thing)))

633

864

634

865

def _get_dbus_property(self, interface_name, property_name):

635

866

"""Returns a bound method if one exists which is a D-Bus

636

867

property with the specified name and interface.

637

868

"""

638

869

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

870

for name, value in (inspect.getmembers

871

(cls,

872

self._is_dbus_thing("property"))):

873

if (value._dbus_name == property_name

874

and value._dbus_interface == interface_name):

641

875

return value.__get__(self)

642

876

643

877

# No such property

644

878

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

879

+ interface_name + "."

646

880

+ property_name)

647

648

881

649

882

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

650

883

out_signature="v")

671

904

# signatures other than "ay".

672

905

if prop._dbus_signature != "ay":

673

906

raise ValueError

674

value = dbus.ByteArray(''.join(unichr(byte)

675

for byte in value))

907

value = dbus.ByteArray(b''.join(chr(byte)

908

for byte in value))

676

909

prop(value)

677

910

678

911

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

683

916

684

917

Note: Will not include properties with access="write".

685

918

"""

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

919

properties = {}

920

for name, prop in self._get_all_dbus_things("property"):

688

921

if (interface_name

689

922

and interface_name != prop._dbus_interface):

690

923

# Interface non-empty but did not match

694

927

continue

695

928

value = prop()

696

929

if not hasattr(value, "variant_level"):

697

all[name] = value

930

properties[name] = value

698

931

continue

699

all[name] = type(value)(value, variant_level=

700

value.variant_level+1)

701

return dbus.Dictionary(all, signature="sv")

932

properties[name] = type(value)(value, variant_level=

933

value.variant_level+1)

934

return dbus.Dictionary(properties, signature="sv")

702

935

703

936

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

704

937

out_signature="s",

705

938

path_keyword='object_path',

706

939

connection_keyword='connection')

707

940

def Introspect(self, object_path, connection):

708

"""Standard D-Bus method, overloaded to insert property tags.

941

"""Overloading of standard D-Bus method.

942

943

Inserts property tags and interface annotation tags.

709

944

"""

710

945

xmlstring = dbus.service.Object.Introspect(self, object_path,

711

946

connection)

718

953

e.setAttribute("access", prop._dbus_access)

719

954

return e

720

955

for if_tag in document.getElementsByTagName("interface"):

956

# Add property tags

721

957

for tag in (make_tag(document, name, prop)

722

958

for name, prop

723

in self._get_all_dbus_properties()

959

in self._get_all_dbus_things("property")

724

960

if prop._dbus_interface

725

961

== if_tag.getAttribute("name")):

726

962

if_tag.appendChild(tag)

963

# Add annotation tags

964

for typ in ("method", "signal", "property"):

965

for tag in if_tag.getElementsByTagName(typ):

966

annots = dict()

967

for name, prop in (self.

968

_get_all_dbus_things(typ)):

969

if (name == tag.getAttribute("name")

970

and prop._dbus_interface

971

== if_tag.getAttribute("name")):

972

annots.update(getattr

973

(prop,

974

"_dbus_annotations",

975

{}))

976

for name, value in annots.iteritems():

977

ann_tag = document.createElement(

978

"annotation")

979

ann_tag.setAttribute("name", name)

980

ann_tag.setAttribute("value", value)

981

tag.appendChild(ann_tag)

982

# Add interface annotation tags

983

for annotation, value in dict(

984

itertools.chain.from_iterable(

985

annotations().iteritems()

986

for name, annotations in

987

self._get_all_dbus_things("interface")

988

if name == if_tag.getAttribute("name")

989

)).iteritems():

990

ann_tag = document.createElement("annotation")

991

ann_tag.setAttribute("name", annotation)

992

ann_tag.setAttribute("value", value)

993

if_tag.appendChild(ann_tag)

727

994

# Add the names to the return values for the

728

995

# "org.freedesktop.DBus.Properties" methods

729

996

if (if_tag.getAttribute("name")

744

1011

except (AttributeError, xml.dom.DOMException,

745

1012

xml.parsers.expat.ExpatError) as error:

746

1013

logger.error("Failed to override Introspection method",

747

error)

1014

exc_info=error)

748

1015

return xmlstring

749

1016

750

1017

755

1022

return dbus.String(dt.isoformat(),

756

1023

variant_level=variant_level)

757

1024

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

def __new__(mcs, name, bases, attr):

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

return type.__new__(mcs, name, bases, attr)

813

1025

1026

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1027

"""A class decorator; applied to a subclass of

1028

dbus.service.Object, it will add alternate D-Bus attributes with

1029

interface names according to the "alt_interface_names" mapping.

1030

Usage:

1031

1032

@alternate_dbus_names({"org.example.Interface":

1033

"net.example.AlternateInterface"})

1034

class SampleDBusObject(dbus.service.Object):

1035

@dbus.service.method("org.example.Interface")

1036

def SampleDBusMethod():

1037

pass

1038

1039

The above "SampleDBusMethod" on "SampleDBusObject" will be

1040

reachable via two interfaces: "org.example.Interface" and

1041

"net.example.AlternateInterface", the latter of which will have

1042

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1043

"true", unless "deprecate" is passed with a False value.

1044

1045

This works for methods and signals, and also for D-Bus properties

1046

(from DBusObjectWithProperties) and interfaces (from the

1047

dbus_interface_annotations decorator).

1048

"""

1049

def wrapper(cls):

1050

for orig_interface_name, alt_interface_name in (

1051

alt_interface_names.iteritems()):

1052

attr = {}

1053

interface_names = set()

1054

# Go though all attributes of the class

1055

for attrname, attribute in inspect.getmembers(cls):

1056

# Ignore non-D-Bus attributes, and D-Bus attributes

1057

# with the wrong interface name

1058

if (not hasattr(attribute, "_dbus_interface")

1059

or not attribute._dbus_interface

1060

.startswith(orig_interface_name)):

1061

continue

1062

# Create an alternate D-Bus interface name based on

1063

# the current name

1064

alt_interface = (attribute._dbus_interface

1065

.replace(orig_interface_name,

1066

alt_interface_name))

1067

interface_names.add(alt_interface)

1068

# Is this a D-Bus signal?

1069

if getattr(attribute, "_dbus_is_signal", False):

1070

# Extract the original non-method function by

1071

# black magic

1072

nonmethod_func = (dict(

1073

zip(attribute.func_code.co_freevars,

1074

attribute.__closure__))["func"]

1075

.cell_contents)

1076

# Create a new, but exactly alike, function

1077

# object, and decorate it to be a new D-Bus signal

1078

# with the alternate D-Bus interface name

1079

new_function = (dbus.service.signal

1080

(alt_interface,

1081

attribute._dbus_signature)

1082

(types.FunctionType(

1083

nonmethod_func.func_code,

1084

nonmethod_func.func_globals,

1085

nonmethod_func.func_name,

1086

nonmethod_func.func_defaults,

1087

nonmethod_func.func_closure)))

1088

# Copy annotations, if any

1089

try:

1090

new_function._dbus_annotations = (

1091

dict(attribute._dbus_annotations))

1092

except AttributeError:

1093

pass

1094

# Define a creator of a function to call both the

1095

# original and alternate functions, so both the

1096

# original and alternate signals gets sent when

1097

# the function is called

1098

def fixscope(func1, func2):

1099

"""This function is a scope container to pass

1100

func1 and func2 to the "call_both" function

1101

outside of its arguments"""

1102

def call_both(*args, **kwargs):

1103

"""This function will emit two D-Bus

1104

signals by calling func1 and func2"""

1105

func1(*args, **kwargs)

1106

func2(*args, **kwargs)

1107

return call_both

1108

# Create the "call_both" function and add it to

1109

# the class

1110

attr[attrname] = fixscope(attribute, new_function)

1111

# Is this a D-Bus method?

1112

elif getattr(attribute, "_dbus_is_method", False):

1113

# Create a new, but exactly alike, function

1114

# object. Decorate it to be a new D-Bus method

1115

# with the alternate D-Bus interface name. Add it

1116

# to the class.

1117

attr[attrname] = (dbus.service.method

1118

(alt_interface,

1119

attribute._dbus_in_signature,

1120

attribute._dbus_out_signature)

1121

(types.FunctionType

1122

(attribute.func_code,

1123

attribute.func_globals,

1124

attribute.func_name,

1125

attribute.func_defaults,

1126

attribute.func_closure)))

1127

# Copy annotations, if any

1128

try:

1129

attr[attrname]._dbus_annotations = (

1130

dict(attribute._dbus_annotations))

1131

except AttributeError:

1132

pass

1133

# Is this a D-Bus property?

1134

elif getattr(attribute, "_dbus_is_property", False):

1135

# Create a new, but exactly alike, function

1136

# object, and decorate it to be a new D-Bus

1137

# property with the alternate D-Bus interface

1138

# name. Add it to the class.

1139

attr[attrname] = (dbus_service_property

1140

(alt_interface,

1141

attribute._dbus_signature,

1142

attribute._dbus_access,

1143

attribute

1144

._dbus_get_args_options

1145

["byte_arrays"])

1146

(types.FunctionType

1147

(attribute.func_code,

1148

attribute.func_globals,

1149

attribute.func_name,

1150

attribute.func_defaults,

1151

attribute.func_closure)))

1152

# Copy annotations, if any

1153

try:

1154

attr[attrname]._dbus_annotations = (

1155

dict(attribute._dbus_annotations))

1156

except AttributeError:

1157

pass

1158

# Is this a D-Bus interface?

1159

elif getattr(attribute, "_dbus_is_interface", False):

1160

# Create a new, but exactly alike, function

1161

# object. Decorate it to be a new D-Bus interface

1162

# with the alternate D-Bus interface name. Add it

1163

# to the class.

1164

attr[attrname] = (dbus_interface_annotations

1165

(alt_interface)

1166

(types.FunctionType

1167

(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

if deprecate:

1173

# Deprecate all alternate interfaces

1174

iname="_AlternateDBusNames_interface_annotation{0}"

1175

for interface_name in interface_names:

1176

@dbus_interface_annotations(interface_name)

1177

def func(self):

1178

return { "org.freedesktop.DBus.Deprecated":

1179

"true" }

1180

# Find an unused name

1181

for aname in (iname.format(i)

1182

for i in itertools.count()):

1183

if aname not in attr:

1184

attr[aname] = func

1185

break

1186

if interface_names:

1187

# Replace the class with a new subclass of it with

1188

# methods, signals, etc. as created above.

1189

cls = type(b"{0}Alternate".format(cls.__name__),

1190

(cls,), attr)

1191

return cls

1192

return wrapper

1193

1194

1195

@alternate_dbus_interfaces({"se.recompile.Mandos":

1196

"se.bsnet.fukt.Mandos"})

814

1197

class ClientDBus(Client, DBusObjectWithProperties):

815

1198

"""A Client class using D-Bus

816

1199

825

1208

# dbus.service.Object doesn't use super(), so we can't either.

826

1209

827

1210

def __init__(self, bus = None, *args, **kwargs):

828

self._approvals_pending = 0

829

1211

self.bus = bus

830

1212

Client.__init__(self, *args, **kwargs)

831

1213

# Only now, when this client is initialized, can it show up on

837

1219

("/clients/" + client_object_name))

838

1220

DBusObjectWithProperties.__init__(self, self.bus,

839

1221

self.dbus_object_path)

840

1222

841

1223

def notifychangeproperty(transform_func,

842

1224

dbus_name, type_func=lambda x: x,

843

1225

variant_level=1):

844

""" Modify a variable so that its a property that announce its

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1226

""" Modify a variable so that it's a property which announces

1227

its changes to DBus.

1228

1229

transform_fun: Function that takes a value and a variant_level

1230

and transforms it to a D-Bus type.

1231

dbus_name: D-Bus name of the variable

849

1232

type_func: Function that transform the value before sending it

850

to DBus

851

variant_level: DBus variant level. default: 1

1233

to the D-Bus. Default: no transform

1234

variant_level: D-Bus variant level. Default: 1

852

1235

"""

853

real_value = [None,]

1236

attrname = "_{0}".format(dbus_name)

854

1237

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

857

1238

if hasattr(self, "dbus_object_path"):

858

if type_func(old_value) != type_func(real_value[0]):

859

dbus_value = transform_func(type_func(real_value[0]),

860

variant_level)

1239

if (not hasattr(self, attrname) or

1240

type_func(getattr(self, attrname, None))

1241

!= type_func(value)):

1242

dbus_value = transform_func(type_func(value),

1243

variant_level

1244

=variant_level)

861

1245

self.PropertyChanged(dbus.String(dbus_name),

862

1246

dbus_value)

1247

setattr(self, attrname, value)

863

1248

864

return property(lambda self: real_value[0], setter)

865

1249

return property(lambda self: getattr(self, attrname), setter)

866

1250

867

1251

expires = notifychangeproperty(datetime_to_dbus, "Expires")

868

1252

approvals_pending = notifychangeproperty(dbus.Boolean,

872

1256

last_enabled = notifychangeproperty(datetime_to_dbus,

873

1257

"LastEnabled")

874

1258

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

875

type_func = lambda checker: checker is not None)

1259

type_func = lambda checker:

1260

checker is not None)

876

1261

last_checked_ok = notifychangeproperty(datetime_to_dbus,

877

1262

"LastCheckedOK")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1263

last_checker_status = notifychangeproperty(dbus.Int16,

1264

"LastCheckerStatus")

1265

last_approval_request = notifychangeproperty(

1266

datetime_to_dbus, "LastApprovalRequest")

880

1267

approved_by_default = notifychangeproperty(dbus.Boolean,

881

1268

"ApprovedByDefault")

882

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

883

type_func = _timedelta_to_milliseconds)

884

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

885

type_func = _timedelta_to_milliseconds)

1269

approval_delay = notifychangeproperty(dbus.UInt64,

1270

"ApprovalDelay",

1271

type_func =

1272

timedelta_to_milliseconds)

1273

approval_duration = notifychangeproperty(

1274

dbus.UInt64, "ApprovalDuration",

1275

type_func = timedelta_to_milliseconds)

886

1276

host = notifychangeproperty(dbus.String, "Host")

887

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

888

type_func = _timedelta_to_milliseconds)

889

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

890

type_func = _timedelta_to_milliseconds)

891

interval = notifychangeproperty(dbus.UInt16, "Interval",

892

type_func = _timedelta_to_milliseconds)

1277

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1278

type_func =

1279

timedelta_to_milliseconds)

1280

extended_timeout = notifychangeproperty(

1281

dbus.UInt64, "ExtendedTimeout",

1282

type_func = timedelta_to_milliseconds)

1283

interval = notifychangeproperty(dbus.UInt64,

1284

"Interval",

1285

type_func =

1286

timedelta_to_milliseconds)

893

1287

checker_command = notifychangeproperty(dbus.String, "Checker")

894

1288

895

1289

del notifychangeproperty

937

1331

return r

938

1332

939

1333

def _reset_approved(self):

940

self._approved = None

1334

self.approved = None

941

1335

return False

942

1336

943

1337

def approve(self, value=True):

944

1338

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

947

1341

(self.approval_duration),

948

1342

self._reset_approved)

949

1343

950

951

1344

## D-Bus methods, signals & properties

952

_interface = "se.bsnet.fukt.Mandos.Client"

953

1345

_interface = "se.recompile.Mandos.Client"

1346

1347

## Interfaces

1348

1349

@dbus_interface_annotations(_interface)

1350

def _foo(self):

1351

return { "org.freedesktop.DBus.Property.EmitsChangedSignal":

1352

"false"}

1353

954

1354

## Signals

955

1355

956

1356

# CheckerCompleted - signal

1055

1455

access="readwrite")

1056

1456

def ApprovalDuration_dbus_property(self, value=None):

1057

1457

if value is None: # get

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1458

return dbus.UInt64(timedelta_to_milliseconds(

1059

1459

self.approval_duration))

1060

1460

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1061

1461

1075

1475

def Host_dbus_property(self, value=None):

1076

1476

if value is None: # get

1077

1477

return dbus.String(self.host)

1078

self.host = value

1478

self.host = unicode(value)

1079

1479

1080

1480

# Created - property

1081

1481

@dbus_service_property(_interface, signature="s", access="read")

1082

1482

def Created_dbus_property(self):

1083

return dbus.String(datetime_to_dbus(self.created))

1483

return datetime_to_dbus(self.created)

1084

1484

1085

1485

# LastEnabled - property

1086

1486

@dbus_service_property(_interface, signature="s", access="read")

1107

1507

return

1108

1508

return datetime_to_dbus(self.last_checked_ok)

1109

1509

1510

# LastCheckerStatus - property

1511

@dbus_service_property(_interface, signature="n",

1512

access="read")

1513

def LastCheckerStatus_dbus_property(self):

1514

return dbus.Int16(self.last_checker_status)

1515

1110

1516

# Expires - property

1111

1517

@dbus_service_property(_interface, signature="s", access="read")

1112

1518

def Expires_dbus_property(self):

1124

1530

if value is None: # get

1125

1531

return dbus.UInt64(self.timeout_milliseconds())

1126

1532

self.timeout = datetime.timedelta(0, 0, 0, value)

1127

if getattr(self, "disable_initiator_tag", None) is None:

1128

return

1129

1533

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

self.expires = (datetime.datetime.utcnow()

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

1534

if self.enabled:

1535

now = datetime.datetime.utcnow()

1536

time_to_die = timedelta_to_milliseconds(

1537

(self.last_checked_ok + self.timeout) - now)

1538

if time_to_die <= 0:

1539

# The timeout has passed

1540

self.disable()

1541

else:

1542

self.expires = (now +

1543

datetime.timedelta(milliseconds =

1544

time_to_die))

1545

if (getattr(self, "disable_initiator_tag", None)

1546

is None):

1547

return

1548

gobject.source_remove(self.disable_initiator_tag)

1549

self.disable_initiator_tag = (gobject.timeout_add

1550

(time_to_die,

1551

self.disable))

1147

1552

1148

1553

# ExtendedTimeout - property

1149

1554

@dbus_service_property(_interface, signature="t",

1162

1567

self.interval = datetime.timedelta(0, 0, 0, value)

1163

1568

if getattr(self, "checker_initiator_tag", None) is None:

1164

1569

return

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

1570

if self.enabled:

1571

# Reschedule checker run

1572

gobject.source_remove(self.checker_initiator_tag)

1573

self.checker_initiator_tag = (gobject.timeout_add

1574

(value, self.start_checker))

1575

self.start_checker() # Start one now, too

1170

1576

1171

1577

# Checker - property

1172

1578

@dbus_service_property(_interface, signature="s",

1174

1580

def Checker_dbus_property(self, value=None):

1175

1581

if value is None: # get

1176

1582

return dbus.String(self.checker_command)

1177

self.checker_command = value

1583

self.checker_command = unicode(value)

1178

1584

1179

1585

# CheckerRunning - property

1180

1586

@dbus_service_property(_interface, signature="b",

1209

1615

raise KeyError()

1210

1616

1211

1617

def __getattribute__(self, name):

1212

if(name == '_pipe'):

1618

if name == '_pipe':

1213

1619

return super(ProxyClient, self).__getattribute__(name)

1214

1620

self._pipe.send(('getattr', name))

1215

1621

data = self._pipe.recv()

1222

1628

return func

1223

1629

1224

1630

def __setattr__(self, name, value):

1225

if(name == '_pipe'):

1631

if name == '_pipe':

1226

1632

return super(ProxyClient, self).__setattr__(name, value)

1227

1633

self._pipe.send(('setattr', name, value))

1228

1634

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1231

1635

1232

1636

class ClientHandler(socketserver.BaseRequestHandler, object):

1233

1637

"""A class to handle client connections.

1313

1717

client.name)

1314

1718

if self.server.use_dbus:

1315

1719

# Emit D-Bus signal

1316

client.Rejected("Disabled")

1720

client.Rejected("Disabled")

1317

1721

return

1318

1722

1319

if client._approved or not client.approval_delay:

1723

if client.approved or not client.approval_delay:

1320

1724

#We are approved or approval is disabled

1321

1725

break

1322

elif client._approved is None:

1726

elif client.approved is None:

1323

1727

logger.info("Client %s needs approval",

1324

1728

client.name)

1325

1729

if self.server.use_dbus:

1336

1740

return

1337

1741

1338

1742

#wait until timeout or approved

1339

#x = float(client._timedelta_to_milliseconds(delay))

1340

1743

time = datetime.datetime.now()

1341

1744

client.changedstate.acquire()

1342

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1745

(client.changedstate.wait

1746

(float(client.timedelta_to_milliseconds(delay)

1747

/ 1000)))

1343

1748

client.changedstate.release()

1344

1749

time2 = datetime.datetime.now()

1345

1750

if (time2 - time) >= delay:

1361

1766

try:

1362

1767

sent = session.send(client.secret[sent_size:])

1363

1768

except gnutls.errors.GNUTLSError as error:

1364

logger.warning("gnutls send failed")

1769

logger.warning("gnutls send failed",

1770

exc_info=error)

1365

1771

return

1366

1772

logger.debug("Sent: %d, remaining: %d",

1367

1773

sent, len(client.secret)

1369

1775

sent_size += sent

1370

1776

1371

1777

logger.info("Sending secret to %s", client.name)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1778

# bump the timeout using extended_timeout

1779

client.bump_timeout(client.extended_timeout)

1374

1780

if self.server.use_dbus:

1375

1781

# Emit D-Bus signal

1376

1782

client.GotSecret()

1381

1787

try:

1382

1788

session.bye()

1383

1789

except gnutls.errors.GNUTLSError as error:

1384

logger.warning("GnuTLS bye failed")

1790

logger.warning("GnuTLS bye failed",

1791

exc_info=error)

1385

1792

1386

1793

@staticmethod

1387

1794

def peer_certificate(session):

1443

1850

# Convert the buffer to a Python bytestring

1444

1851

fpr = ctypes.string_at(buf, buf_len.value)

1445

1852

# Convert the bytestring to hexadecimal notation

1446

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1853

hex_fpr = binascii.hexlify(fpr).upper()

1447

1854

return hex_fpr

1448

1855

1449

1856

1452

1859

def sub_process_main(self, request, address):

1453

1860

try:

1454

1861

self.finish_request(request, address)

1455

except:

1862

except Exception:

1456

1863

self.handle_error(request, address)

1457

1864

self.close_request(request)

1458

1865

1459

1866

def process_request(self, request, address):

1460

1867

"""Start a new process to process the request."""

1461

multiprocessing.Process(target = self.sub_process_main,

1462

args = (request, address)).start()

1868

proc = multiprocessing.Process(target = self.sub_process_main,

1869

args = (request, address))

1870

proc.start()

1871

return proc

1463

1872

1464

1873

1465

1874

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1471

1880

"""

1472

1881

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1473

1882

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1883

proc = MultiprocessingMixIn.process_request(self, request,

1884

client_address)

1476

1885

self.child_pipe.close()

1477

self.add_pipe(parent_pipe)

1886

self.add_pipe(parent_pipe, proc)

1478

1887

1479

def add_pipe(self, parent_pipe):

1888

def add_pipe(self, parent_pipe, proc):

1480

1889

"""Dummy function; override as necessary"""

1481

1890

raise NotImplementedError

1482

1891

1560

1969

self.enabled = False

1561

1970

self.clients = clients

1562

1971

if self.clients is None:

1563

self.clients = set()

1972

self.clients = {}

1564

1973

self.use_dbus = use_dbus

1565

1974

self.gnutls_priority = gnutls_priority

1566

1975

IPv6_TCPServer.__init__(self, server_address,

1570

1979

def server_activate(self):

1571

1980

if self.enabled:

1572

1981

return socketserver.TCPServer.server_activate(self)

1982

1573

1983

def enable(self):

1574

1984

self.enabled = True

1575

def add_pipe(self, parent_pipe):

1985

1986

def add_pipe(self, parent_pipe, proc):

1576

1987

# Call "handle_ipc" for both data and EOF events

1577

1988

gobject.io_add_watch(parent_pipe.fileno(),

1578

1989

gobject.IO_IN | gobject.IO_HUP,

1579

1990

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1991

parent_pipe =

1992

parent_pipe,

1993

proc = proc))

1994

1582

1995

def handle_ipc(self, source, condition, parent_pipe=None,

1583

client_object=None):

1584

condition_names = {

1585

gobject.IO_IN: "IN", # There is data to read.

1586

gobject.IO_OUT: "OUT", # Data can be written (without

1587

# blocking).

1588

gobject.IO_PRI: "PRI", # There is urgent data to read.

1589

gobject.IO_ERR: "ERR", # Error condition.

1590

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

# error or the other end of multiprocessing.Pipe has closed

1599

if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):

1996

proc = None, client_object=None):

1997

# error, or the other end of multiprocessing.Pipe has closed

1998

if condition & (gobject.IO_ERR | gobject.IO_HUP):

1999

# Wait for other process to exit

2000

proc.join()

1600

2001

return False

1601

2002

1602

2003

# Read a request from the child

1607

2008

fpr = request[1]

1608

2009

address = request[2]

1609

2010

1610

for c in self.clients:

2011

for c in self.clients.itervalues():

1611

2012

if c.fingerprint == fpr:

1612

2013

client = c

1613

2014

break

1616

2017

"dress: %s", fpr, address)

1617

2018

if self.use_dbus:

1618

2019

# Emit D-Bus signal

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2020

mandos_dbus_service.ClientNotFound(fpr,

2021

address[0])

1620

2022

parent_pipe.send(False)

1621

2023

return False

1622

2024

1623

2025

gobject.io_add_watch(parent_pipe.fileno(),

1624

2026

gobject.IO_IN | gobject.IO_HUP,

1625

2027

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2028

parent_pipe =

2029

parent_pipe,

2030

proc = proc,

2031

client_object =

2032

client))

1628

2033

parent_pipe.send(True)

1629

# remove the old hook in favor of the new above hook on same fileno

2034

# remove the old hook in favor of the new above hook on

2035

# same fileno

1630

2036

return False

1631

2037

if command == 'funcall':

1632

2038

funcname = request[1]

1633

2039

args = request[2]

1634

2040

kwargs = request[3]

1635

2041

1636

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2042

parent_pipe.send(('data', getattr(client_object,

2043

funcname)(*args,

2044

**kwargs)))

1637

2045

1638

2046

if command == 'getattr':

1639

2047

attrname = request[1]

1640

2048

if callable(client_object.__getattribute__(attrname)):

1641

2049

parent_pipe.send(('function',))

1642

2050

else:

1643

parent_pipe.send(('data', client_object.__getattribute__(attrname)))

2051

parent_pipe.send(('data', client_object

2052

.__getattribute__(attrname)))

1644

2053

1645

2054

if command == 'setattr':

1646

2055

attrname = request[1]

1682

2091

elif suffix == "w":

1683

2092

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

1684

2093

else:

1685

raise ValueError("Unknown suffix %r" % suffix)

2094

raise ValueError("Unknown suffix {0!r}"

2095

.format(suffix))

1686

2096

except (ValueError, IndexError) as e:

1687

2097

raise ValueError(*(e.args))

1688

2098

timevalue += delta

1689

2099

return timevalue

1690

2100

1691

2101

1692

def if_nametoindex(interface):

1693

"""Call the C function if_nametoindex(), or equivalent

1694

1695

Note: This function cannot accept a unicode string."""

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

(ctypes.util.find_library("c"))

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

logger.warning("Doing if_nametoindex the hard way")

1703

def if_nametoindex(interface):

1704

"Get an interface index the hard way, i.e. using fcntl()"

1705

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1706

with contextlib.closing(socket.socket()) as s:

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

struct.pack(str("16s16x"),

1709

interface))

1710

interface_index = struct.unpack(str("I"),

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

1716

2102

def daemon(nochdir = False, noclose = False):

1717

2103

"""See daemon(3). Standard BSD Unix function.

1718

2104

1726

2112

sys.exit()

1727

2113

if not noclose:

1728

2114

# Close all standard open file descriptors

1729

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2115

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1730

2116

if not stat.S_ISCHR(os.fstat(null).st_mode):

1731

2117

raise OSError(errno.ENODEV,

1732

"%s not a character device"

1733

% os.path.devnull)

2118

"{0} not a character device"

2119

.format(os.devnull))

1734

2120

os.dup2(null, sys.stdin.fileno())

1735

2121

os.dup2(null, sys.stdout.fileno())

1736

2122

os.dup2(null, sys.stderr.fileno())

1745

2131

1746

2132

parser = argparse.ArgumentParser()

1747

2133

parser.add_argument("-v", "--version", action="version",

1748

version = "%%(prog)s %s" % version,

2134

version = "%(prog)s {0}".format(version),

1749

2135

help="show version number and exit")

1750

2136

parser.add_argument("-i", "--interface", metavar="IF",

1751

2137

help="Bind to interface IF")

1773

2159

" system bus interface")

1774

2160

parser.add_argument("--no-ipv6", action="store_false",

1775

2161

dest="use_ipv6", help="Do not use IPv6")

2162

parser.add_argument("--no-restore", action="store_false",

2163

dest="restore", help="Do not restore stored"

2164

" state")

2165

parser.add_argument("--statedir", metavar="DIR",

2166

help="Directory to save/restore state in")

2167

1776

2168

options = parser.parse_args()

1777

2169

1778

2170

if options.check:

1791

2183

"use_dbus": "True",

1792

2184

"use_ipv6": "True",

1793

2185

"debuglevel": "",

2186

"restore": "True",

2187

"statedir": "/var/lib/mandos"

1794

2188

}

1795

2189

1796

2190

# Parse config file for server-global settings

1813

2207

# options, if set.

1814

2208

for option in ("interface", "address", "port", "debug",

1815

2209

"priority", "servicename", "configdir",

1816

"use_dbus", "use_ipv6", "debuglevel"):

2210

"use_dbus", "use_ipv6", "debuglevel", "restore",

2211

"statedir"):

1817

2212

value = getattr(options, option)

1818

2213

if value is not None:

1819

2214

server_settings[option] = value

1831

2226

debuglevel = server_settings["debuglevel"]

1832

2227

use_dbus = server_settings["use_dbus"]

1833

2228

use_ipv6 = server_settings["use_ipv6"]

2229

stored_state_path = os.path.join(server_settings["statedir"],

2230

stored_state_file)

2231

2232

if debug:

2233

initlogger(debug, logging.DEBUG)

2234

else:

2235

if not debuglevel:

2236

initlogger(debug)

2237

else:

2238

level = getattr(logging, debuglevel.upper())

2239

initlogger(debug, level)

1834

2240

1835

2241

if server_settings["servicename"] != "Mandos":

1836

2242

syslogger.setFormatter(logging.Formatter

1837

('Mandos (%s) [%%(process)d]:'

1838

' %%(levelname)s: %%(message)s'

1839

% server_settings["servicename"]))

2243

('Mandos ({0}) [%(process)d]:'

2244

' %(levelname)s: %(message)s'

2245

.format(server_settings

2246

["servicename"])))

1840

2247

1841

2248

# Parse config file with clients

1842

client_defaults = { "timeout": "5m",

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

"checker": "fping -q -- %%(host)s",

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2249

client_config = configparser.SafeConfigParser(Client

2250

.client_defaults)

1851

2251

client_config.read(os.path.join(server_settings["configdir"],

1852

2252

"clients.conf"))

1853

2253

1867

2267

pidfilename = "/var/run/mandos.pid"

1868

2268

try:

1869

2269

pidfile = open(pidfilename, "w")

1870

except IOError:

1871

logger.error("Could not open file %r", pidfilename)

2270

except IOError as e:

2271

logger.error("Could not open file %r", pidfilename,

2272

exc_info=e)

1872

2273

1873

try:

1874

uid = pwd.getpwnam("_mandos").pw_uid

1875

gid = pwd.getpwnam("_mandos").pw_gid

1876

except KeyError:

2274

for name in ("_mandos", "mandos", "nobody"):

1877

2275

try:

1878

uid = pwd.getpwnam("mandos").pw_uid

1879

gid = pwd.getpwnam("mandos").pw_gid

2276

uid = pwd.getpwnam(name).pw_uid

2277

gid = pwd.getpwnam(name).pw_gid

2278

break

1880

2279

except KeyError:

1881

try:

1882

uid = pwd.getpwnam("nobody").pw_uid

1883

gid = pwd.getpwnam("nobody").pw_gid

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2280

continue

2281

else:

2282

uid = 65534

2283

gid = 65534

1887

2284

try:

1888

2285

os.setgid(gid)

1889

2286

os.setuid(uid)

1891

2288

if error[0] != errno.EPERM:

1892

2289

raise error

1893

2290

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

level = getattr(logging, debuglevel.upper())

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

1901

1902

2291

if debug:

1903

2292

# Enable all possible GnuTLS debugging

1904

2293

1914

2303

.gnutls_global_set_log_function(debug_gnutls))

1915

2304

1916

2305

# Redirect stdin so all checkers get /dev/null

1917

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2306

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1918

2307

os.dup2(null, sys.stdin.fileno())

1919

2308

if null > 2:

1920

2309

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

1924

2310

1925

2311

# Need to fork before connecting to D-Bus

1926

2312

if not debug:

1927

2313

# Close all input and output, do double fork, etc.

1928

2314

daemon()

1929

2315

2316

gobject.threads_init()

2317

1930

2318

global main_loop

1931

2319

# From the Avahi example code

1932

DBusGMainLoop(set_as_default=True )

2320

DBusGMainLoop(set_as_default=True)

1933

2321

main_loop = gobject.MainLoop()

1934

2322

bus = dbus.SystemBus()

1935

2323

# End of Avahi example code

1936

2324

if use_dbus:

1937

2325

try:

1938

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

2326

bus_name = dbus.service.BusName("se.recompile.Mandos",

2327

bus, do_not_queue=True)

2328

old_bus_name = (dbus.service.BusName

2329

("se.bsnet.fukt.Mandos", bus,

2330

do_not_queue=True))

1942

2331

except dbus.exceptions.NameExistsException as e:

1943

logger.error(unicode(e) + ", disabling D-Bus")

2332

logger.error("Disabling D-Bus:", exc_info=e)

1944

2333

use_dbus = False

1945

2334

server_settings["use_dbus"] = False

1946

2335

tcp_server.use_dbus = False

1947

2336

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

service = AvahiService(name = server_settings["servicename"],

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

2337

service = AvahiServiceToSyslog(name =

2338

server_settings["servicename"],

2339

servicetype = "_mandos._tcp",

2340

protocol = protocol, bus = bus)

1951

2341

if server_settings["interface"]:

1952

2342

service.interface = (if_nametoindex

1953

2343

(str(server_settings["interface"])))

1957

2347

1958

2348

client_class = Client

1959

2349

if use_dbus:

1960

client_class = functools.partial(ClientDBusTransitional, bus = bus)

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

for name, value in config.items(section):

2350

client_class = functools.partial(ClientDBus, bus = bus)

2351

2352

client_settings = Client.config_parser(client_config)

2353

old_client_settings = {}

2354

clients_data = {}

2355

2356

# Get client data and settings from last running state.

2357

if server_settings["restore"]:

2358

try:

2359

with open(stored_state_path, "rb") as stored_state:

2360

clients_data, old_client_settings = (pickle.load

2361

(stored_state))

2362

os.remove(stored_state_path)

2363

except IOError as e:

2364

if e.errno == errno.ENOENT:

2365

logger.warning("Could not load persistent state: {0}"

2366

.format(os.strerror(e.errno)))

2367

else:

2368

logger.critical("Could not load persistent state:",

2369

exc_info=e)

2370

raise

2371

except EOFError as e:

2372

logger.warning("Could not load persistent state: "

2373

"EOFError:", exc_info=e)

2374

2375

with PGPEngine() as pgp:

2376

for client_name, client in clients_data.iteritems():

2377

# Decide which value to use after restoring saved state.

2378

# We have three different values: Old config file,

2379

# new config file, and saved state.

2380

# New config value takes precedence if it differs from old

2381

# config value, otherwise use saved state.

2382

for name, value in client_settings[client_name].items():

2383

try:

2384

# For each value in new config, check if it

2385

# differs from the old config value (Except for

2386

# the "secret" attribute)

2387

if (name != "secret" and

2388

value != old_client_settings[client_name]

2389

[name]):

2390

client[name] = value

2391

except KeyError:

2392

pass

2393

2394

# Clients who has passed its expire date can still be

2395

# enabled if its last checker was successful. Clients

2396

# whose checker succeeded before we stored its state is

2397

# assumed to have successfully run all checkers during

2398

# downtime.

2399

if client["enabled"]:

2400

if datetime.datetime.utcnow() >= client["expires"]:

2401

if not client["last_checked_ok"]:

2402

logger.warning(

2403

"disabling client {0} - Client never "

2404

"performed a successful checker"

2405

.format(client_name))

2406

client["enabled"] = False

2407

elif client["last_checker_status"] != 0:

2408

logger.warning(

2409

"disabling client {0} - Client "

2410

"last checker failed with error code {1}"

2411

.format(client_name,

2412

client["last_checker_status"]))

2413

client["enabled"] = False

2414

else:

2415

client["expires"] = (datetime.datetime

2416

.utcnow()

2417

+ client["timeout"])

2418

logger.debug("Last checker succeeded,"

2419

" keeping {0} enabled"

2420

.format(client_name))

1968

2421

try:

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

2422

client["secret"] = (

2423

pgp.decrypt(client["encrypted_secret"],

2424

client_settings[client_name]

2425

["secret"]))

2426

except PGPError:

2427

# If decryption fails, we use secret from new settings

2428

logger.debug("Failed to decrypt {0} old secret"

2429

.format(client_name))

2430

client["secret"] = (

2431

client_settings[client_name]["secret"])

2432

2433

# Add/remove clients based on new changes made to config

2434

for client_name in (set(old_client_settings)

2435

- set(client_settings)):

2436

del clients_data[client_name]

2437

for client_name in (set(client_settings)

2438

- set(old_client_settings)):

2439

clients_data[client_name] = client_settings[client_name]

2440

2441

# Create all client objects

2442

for client_name, client in clients_data.iteritems():

2443

tcp_server.clients[client_name] = client_class(

2444

name = client_name, settings = client)

2445

1978

2446

if not tcp_server.clients:

1979

2447

logger.warning("No clients defined")

1980

2448

1981

2449

if not debug:

1982

2450

try:

1983

2451

with pidfile:

1991

2459

# "pidfile" was never created

1992

2460

pass

1993

2461

del pidfilename

1994

1995

2462

signal.signal(signal.SIGINT, signal.SIG_IGN)

1996

2463

1997

2464

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

1998

2465

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

1999

2466

2000

2467

if use_dbus:

2001

class MandosDBusService(dbus.service.Object):

2468

@alternate_dbus_interfaces({"se.recompile.Mandos":

2469

"se.bsnet.fukt.Mandos"})

2470

class MandosDBusService(DBusObjectWithProperties):

2002

2471

"""A D-Bus proxy object"""

2003

2472

def __init__(self):

2004

2473

dbus.service.Object.__init__(self, bus, "/")

2005

_interface = "se.bsnet.fukt.Mandos"

2474

_interface = "se.recompile.Mandos"

2475

2476

@dbus_interface_annotations(_interface)

2477

def _foo(self):

2478

return { "org.freedesktop.DBus.Property"

2479

".EmitsChangedSignal":

2480

"false"}

2006

2481

2007

2482

@dbus.service.signal(_interface, signature="o")

2008

2483

def ClientAdded(self, objpath):

2023

2498

def GetAllClients(self):

2024

2499

"D-Bus method"

2025

2500

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2501

for c in

2502

tcp_server.clients.itervalues())

2027

2503

2028

2504

@dbus.service.method(_interface,

2029

2505

out_signature="a{oa{sv}}")

2031

2507

"D-Bus method"

2032

2508

return dbus.Dictionary(

2033

2509

((c.dbus_object_path, c.GetAll(""))

2034

for c in tcp_server.clients),

2510

for c in tcp_server.clients.itervalues()),

2035

2511

signature="oa{sv}")

2036

2512

2037

2513

@dbus.service.method(_interface, in_signature="o")

2038

2514

def RemoveClient(self, object_path):

2039

2515

"D-Bus method"

2040

for c in tcp_server.clients:

2516

for c in tcp_server.clients.itervalues():

2041

2517

if c.dbus_object_path == object_path:

2042

tcp_server.clients.remove(c)

2518

del tcp_server.clients[c.name]

2043

2519

c.remove_from_connection()

2044

2520

# Don't signal anything except ClientRemoved

2045

2521

c.disable(quiet=True)

2050

2526

2051

2527

del _interface

2052

2528

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2529

mandos_dbus_service = MandosDBusService()

2056

2530

2057

2531

def cleanup():

2058

2532

"Cleanup function; run on exit"

2059

2533

service.cleanup()

2060

2534

2535

multiprocessing.active_children()

2536

if not (tcp_server.clients or client_settings):

2537

return

2538

2539

# Store client before exiting. Secrets are encrypted with key

2540

# based on what config file has. If config file is

2541

# removed/edited, old secret will thus be unrecovable.

2542

clients = {}

2543

with PGPEngine() as pgp:

2544

for client in tcp_server.clients.itervalues():

2545

key = client_settings[client.name]["secret"]

2546

client.encrypted_secret = pgp.encrypt(client.secret,

2547

key)

2548

client_dict = {}

2549

2550

# A list of attributes that can not be pickled

2551

# + secret.

2552

exclude = set(("bus", "changedstate", "secret",

2553

"checker"))

2554

for name, typ in (inspect.getmembers

2555

(dbus.service.Object)):

2556

exclude.add(name)

2557

2558

client_dict["encrypted_secret"] = (client

2559

.encrypted_secret)

2560

for attr in client.client_structure:

2561

if attr not in exclude:

2562

client_dict[attr] = getattr(client, attr)

2563

2564

clients[client.name] = client_dict

2565

del client_settings[client.name]["secret"]

2566

2567

try:

2568

with (tempfile.NamedTemporaryFile

2569

(mode='wb', suffix=".pickle", prefix='clients-',

2570

dir=os.path.dirname(stored_state_path),

2571

delete=False)) as stored_state:

2572

pickle.dump((clients, client_settings), stored_state)

2573

tempname=stored_state.name

2574

os.rename(tempname, stored_state_path)

2575

except (IOError, OSError) as e:

2576

if not debug:

2577

try:

2578

os.remove(tempname)

2579

except NameError:

2580

pass

2581

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2582

logger.warning("Could not save persistent state: {0}"

2583

.format(os.strerror(e.errno)))

2584

else:

2585

logger.warning("Could not save persistent state:",

2586

exc_info=e)

2587

raise e

2588

2589

# Delete all clients, and settings from config

2061

2590

while tcp_server.clients:

2062

client = tcp_server.clients.pop()

2591

name, client = tcp_server.clients.popitem()

2063

2592

if use_dbus:

2064

2593

client.remove_from_connection()

2065

client.disable_hook = None

2066

2594

# Don't signal anything except ClientRemoved

2067

2595

client.disable(quiet=True)

2068

2596

if use_dbus:

2069

2597

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2598

mandos_dbus_service.ClientRemoved(client

2599

.dbus_object_path,

2071

2600

client.name)

2601

client_settings.clear()

2072

2602

2073

2603

atexit.register(cleanup)

2074

2604

2075

for client in tcp_server.clients:

2605

for client in tcp_server.clients.itervalues():

2076

2606

if use_dbus:

2077

2607

# Emit D-Bus signal

2078

2608

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

client.enable()

2609

# Need to initiate checking of clients

2610

if client.enabled:

2611

client.init_checker()

2080

2612

2081

2613

tcp_server.enable()

2082

2614

tcp_server.server_activate()

2085

2617

service.port = tcp_server.socket.getsockname()[1]

2086

2618

if use_ipv6:

2087

2619

logger.info("Now listening on address %r, port %d,"

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2620

" flowinfo %d, scope_id %d",

2621

*tcp_server.socket.getsockname())

2090

2622

else: # IPv4

2091

logger.info("Now listening on address %r, port %d"

2092

% tcp_server.socket.getsockname())

2623

logger.info("Now listening on address %r, port %d",

2624

*tcp_server.socket.getsockname())

2093

2625

2094

2626

#service.interface = tcp_server.socket.getsockname()[3]

2095

2627

2098

2630

try:

2099

2631

service.activate()

2100

2632

except dbus.exceptions.DBusException as error:

2101

logger.critical("DBusException: %s", error)

2633

logger.critical("D-Bus Exception", exc_info=error)

2102

2634

cleanup()

2103

2635

sys.exit(1)

2104

2636

# End of Avahi example code

2111

2643

logger.debug("Starting main loop")

2112

2644

main_loop.run()

2113

2645

except AvahiError as error:

2114

logger.critical("AvahiError: %s", error)

2646

logger.critical("Avahi Error", exc_info=error)

2115

2647

cleanup()

2116

2648

sys.exit(1)

2117

2649

except KeyboardInterrupt:

2122

2654

# Must run before the D-Bus bus name gets deregistered

2123

2655

cleanup()

2124

2656

2125

2126

2657

if __name__ == '__main__':

2127

2658

main()